<?php

namespace App\Http\Utils\OAuth1;

/**
 *
 * @ignore
 *
 */
class OAuthRequest {
	private $parameters;
	private $http_method;
	private $http_url;
	// for debug purposes
	public $base_string;
	public static $version = '1.0a';
	public static $POST_INPUT = 'php://input';
	function __construct($http_method, $http_url, $parameters = NULL) {
		@$parameters or $parameters = array ();
		$this->parameters = $parameters;
		$this->http_method = $http_method;
		$this->http_url = $http_url;
	}
	
	/**
	 * attempt to build up a request from what was passed to the server
	 */
	public static function from_request($http_method = NULL, $http_url = NULL, $parameters = NULL) {
		$scheme = (! isset ( $_SERVER ['HTTPS'] ) || $_SERVER ['HTTPS'] != "on") ? 'http' : 'https';
		@$http_url or $http_url = $scheme . '://' . $_SERVER ['HTTP_HOST'] . ':' . $_SERVER ['SERVER_PORT'] . $_SERVER ['REQUEST_URI'];
		@$http_method or $http_method = $_SERVER ['REQUEST_METHOD'];
		
		// We weren't handed any parameters, so let's find the ones relevant to
		// this request.
		// If you run XML-RPC or similar you should use this to provide your own
		// parsed parameter-list
		if (! $parameters) {
			// Find request headers
			$request_headers = OAuthUtil::get_headers ();
			
			// Parse the query-string to find GET parameters
			$parameters = OAuthUtil::parse_parameters ( $_SERVER ['QUERY_STRING'] );
			
			// It's a POST request of the proper content-type, so parse POST
			// parameters and add those overriding any duplicates from GET
			if ($http_method == "POST" && @strstr ( $request_headers ["Content-Type"], "application/x-www-form-urlencoded" )) {
				$post_data = OAuthUtil::parse_parameters ( file_get_contents ( self::$POST_INPUT ) );
				$parameters = array_merge ( $parameters, $post_data );
			}
			
			// We have a Authorization-header with OAuth data. Parse the header
			// and add those overriding any duplicates from GET or POST
			if (@substr ( $request_headers ['Authorization'], 0, 6 ) == "OAuth ") {
				$header_parameters = OAuthUtil::split_header ( $request_headers ['Authorization'] );
				$parameters = array_merge ( $parameters, $header_parameters );
			}
		}
		
		return new OAuthRequest ( $http_method, $http_url, $parameters );
	}
	
	/**
	 * pretty much a helper function to set up the request
	 */
	public static function from_consumer_and_token($consumer, $token, $http_method, $http_url, $parameters = NULL) {
		@$parameters or $parameters = array ();
		$defaults = array (
				"oauth_version" => OAuthRequest::$version,
				"oauth_nonce" => OAuthRequest::generate_nonce (),
				"oauth_timestamp" => OAuthRequest::generate_timestamp (),
				"oauth_consumer_key" => $consumer->key 
		);
		if ($token)
			$defaults ['oauth_token'] = $token->key;
		
		$parameters = array_merge ( $defaults, $parameters );
		
		return new OAuthRequest ( $http_method, $http_url, $parameters );
	}
	public function set_parameter($name, $value, $allow_duplicates = true) {
		if ($allow_duplicates && isset ( $this->parameters [$name] )) {
			// We have already added parameter(s) with this name, so add to the list
			if (is_scalar ( $this->parameters [$name] )) {
				// This is the first duplicate, so transform scalar (string)
				// into an array so we can add the duplicates
				$this->parameters [$name] = array (
						$this->parameters [$name] 
				);
			}
			
			$this->parameters [$name] [] = $value;
		} else {
			$this->parameters [$name] = $value;
		}
	}
	public function get_parameter($name) {
		return isset ( $this->parameters [$name] ) ? $this->parameters [$name] : null;
	}
	public function get_parameters() {
		return $this->parameters;
	}
	public function unset_parameter($name) {
		unset ( $this->parameters [$name] );
	}
	
	/**
	 * The request parameters, sorted and concatenated into a normalized string.
	 *
	 * @return string
	 */
	public function get_signable_parameters() {
		// Grab all parameters
		$params = $this->parameters;
		
		// remove pic
		if (isset ( $params ['pic'] )) {
			unset ( $params ['pic'] );
		}
		
		if (isset ( $params ['image'] )) {
			unset ( $params ['image'] );
		}
		
		// Remove oauth_signature if present
		// Ref: Spec: 9.1.1 ("The oauth_signature parameter MUST be excluded.")
		if (isset ( $params ['oauth_signature'] )) {
			unset ( $params ['oauth_signature'] );
		}
		
		return OAuthUtil::build_http_query ( $params );
	}
	
	/**
	 * Returns the base string of this request
	 *
	 * The base string defined as the method, the url
	 * and the parameters (normalized), each urlencoded
	 * and the concated with &.
	 */
	public function get_signature_base_string() {
		$parts = array (
				$this->get_normalized_http_method (),
				$this->get_normalized_http_url (),
				$this->get_signable_parameters () 
		);
		
		// print_r( $parts );
		
		$parts = OAuthUtil::urlencode_rfc3986 ( $parts );
		
		return implode ( '&', $parts );
	}
	
	/**
	 * just uppercases the http method
	 */
	public function get_normalized_http_method() {
		return strtoupper ( $this->http_method );
	}
	
	/**
	 * parses the url and rebuilds it to be
	 * scheme://host/path
	 */
	public function get_normalized_http_url() {
		$parts = parse_url ( $this->http_url );
		
		$port = @$parts ['port'];
		$scheme = $parts ['scheme'];
		$host = $parts ['host'];
		$path = @$parts ['path'];
		
		$port or $port = ($scheme == 'https') ? '443' : '80';
		
		if (($scheme == 'https' && $port != '443') || ($scheme == 'http' && $port != '80')) {
			$host = "$host:$port";
		}
		return "$scheme://$host$path";
	}
	
	/**
	 * builds a url usable for a GET request
	 */
	public function to_url() {
		$post_data = $this->to_postdata ();
		$out = $this->get_normalized_http_url ();
		if ($post_data) {
			$out .= '?' . $post_data;
		}
		return $out;
	}
	
	/**
	 * builds the data one would send in a POST request
	 */
	public function to_postdata($multi = false) {
		// echo "multi=" . $multi . '`';
		if ($multi)
			return OAuthUtil::build_http_query_multi ( $this->parameters );
		else
			return OAuthUtil::build_http_query ( $this->parameters );
	}
	
	/**
	 * builds the Authorization: header
	 */
	public function to_header() {
		$out = 'Authorization: OAuth realm=""';
		$total = array ();
		foreach ( $this->parameters as $k => $v ) {
			if (substr ( $k, 0, 5 ) != "oauth")
				continue;
			if (is_array ( $v )) {
				throw new OAuthNewException ( 'Arrays not supported in headers' );
			}
			$out .= ',' . OAuthUtil::urlencode_rfc3986 ( $k ) . '="' . OAuthUtil::urlencode_rfc3986 ( $v ) . '"';
		}
		return $out;
	}
	public function __toString() {
		return $this->to_url ();
	}
	public function sign_request($signature_method, $consumer, $token) {
		$this->set_parameter ( "oauth_signature_method", $signature_method->get_name (), false );
		$signature = $this->build_signature ( $signature_method, $consumer, $token );
		// echo "sign=" . $signature;
		$this->set_parameter ( "oauth_signature", $signature, false );
	}
	public function build_signature($signature_method, $consumer, $token) {
		$signature = $signature_method->build_signature ( $this, $consumer, $token );
		return $signature;
	}
	
	/**
	 * util function: current timestamp
	 */
	private static function generate_timestamp() {
		// return 1273566716;
		// echo date("y-m-d H:i:s");
		return time ();
	}
	
	/**
	 * util function: current nonce
	 */
	private static function generate_nonce() {
		// return '462d316f6f40c40a9e0eef1b009f37fa';
		$mt = microtime ();
		$rand = mt_rand ();
		
		return md5 ( $mt . $rand ); // md5s look nicer than numbers
	}
}